Climate scientists often refer to the Arctic as an early-warning system for the rest of planet — rising mercury and melting ice there are just precursors to scorching-hot summers and rising seas elsewhere.

In response to this increasingly alarming situation, activist group Greenpeace joined forces with Italian concert pianist Ludovico Einaudi, also known for composing the music for "Black Swan," for a floating concert on a 2.2-ton platform designed to look like an iceberg.

Ludovico played his moving piece, "Elegy for the Arctic," in front of Norway's Wahlenbergbreen Glacier.

In a perfectly dramatic fashion, part of the glacier crumbles as Ludovico's hands tumble towards the low notes of the piano.